Not as much discussion of the auto focus on the X20 as the X100s - does it seem as fast and accurate? How does it do at the longer end of the zoom, say for portraits in moderate to low light? That's the place really good auto focus tends to matter most to me and can be the most frustrating. Not as much of an issue with the fixed semi-wide lens on the X100s, but since the X20 zooms in to portrait shooting length, I'm more interested in how it does shooting at those focal lengths.

Love the reviews. So between the two X cameras, which one has seen the greatest improvement?

*Split image btw is very cool, very rangefinder.

Click to expand...

I'd say the X100S had the largest improvement, as the AF performance was the major problem with the X100. The X10 already had pretty good AF, though it's even better now. Both have had huge improvements in image quality.